Magneto-electric machine.



T. M. MUELLER.

MAGNETO ELECTRIC MACHINE.

APPLICATION FILLED 313.25, 1909.

943,697. Patented Dec. 21,1909.

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WITNESSES- I %%d% [NVE N T OR.

T; M. MUELLER. MAGNETO ELEGTRIG MACHINE. APPLIOATIOiIIILED PEB.25. 1909.

Patented Dec.21,1909.

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' INVENTORQ WITNESSES.-

T. M. MUELLER. MAGNETO ELECTRIC MACHINE.

Patented Dec. 21. 19019.

APPLICATION I'ILED FEB.25, 1909.

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ATTQRNE THEODOR M. MUELLER, OI IDALTON, MASSACHUSETTS.

MAGNETO-ELECTRIC MACHINE.

Specification of Letters Patent.

Patented Dec. 21, 1909.

Application filed February 25, 1909. Serial No. 480,035.

To all 'w/wm it may concern:

Be it known that I, Tnronon M. MUELLER, a subject of the Emperor of Germany, residing at Dalton, in the county of Berkshire and State of Massachusetts, have invented new and useful Improvements in Magneto- Electric Machines, of which the following is a specification.

This invention relates to improvements in magneto electric machines of the inductor alternator type, and is designed for, and has as its object the generation of electric our rents to be used in'the ignition of the vaporous or gaseous charge in internal combustion engines, although i do not limit myself to this particular use.

The especial feature of the invention lies I inthe production of an electric generator which employs a simple armature or in ductor element, and-art ad ustable element "for varying the density of the magnetic flux through the inductor element. 1

The particulan objects of the invention are,-(1) To provide means for rendering the' different elements of ,the machine easy (2) To provide means for the adjustment Oi certain parts of the machine so that the timing or the production of the spark may be regulated so as to correspond with the position of the piston movemcnts, that is to say causing either an advanced or retarded ignition of the charge, desired. for thelocation and (3) To .provide arrangement of the primary and secondary windings so that there is absolutely no danger of injury to the same or failure to operate; (4) To provide a machinethat is readily adapted for use either with a two-cycle orfour-cycle engine of an internal combustion engine; To provide means for advancing and retarding the spark and at the same time maintaining the maximum induction. in the primary and secondary windings whereby the spark current is always maintained at the maximum amount. I j I Other objects of the invention will appear in the body of the specification and be particularly pointed out in the claims.

In the drawings forming part of this application,Figure 1 is a detail, longitudinal, sectional View through the driving-shaft of the machine on the line 11 of Fi 4-, with certain parts omitted, clearly illi strating theiaminated construction of thenirmature or mductor element. the-arrangement and 'a correspondingly location of the primary and secondary windings, and also clearly illustrating the posi-i tion of the condenser. Fig. 2 is a view similar to Fig. 1 but showing a slightly modified-i construction as regards the location of the condenser, and also in the make and break, mechanism. Fig. 3 is a transverse sectional view on the line 3-3 of Fig. 1, clearly showing the construction of the armature or inductor element and the adjustable cylindrical" element located between the pole-pieces and the armature. Fig. i 1s an'end elevation of t Fig. 1 with the end casing and coil-removed illustrating the make and break mechanismand the cam carried on the armature shaft for operating the make and break mechanism; also showing in dotted linesthe lead wires for conveying the spark current to the various cylinders of theengine.

Referring to the drawings in detail, a designates a compound permanent magnet provided with the soft iron pole-pieces b that are secured to the magnets a by means of the mach ne screws 0. Located in a plane transverse to the plane of the magnet a are the soft iron laminated pieces (Z to which are secured the pieces 8 and-ilito which the screws 0 extend for securing the same, in place. Extending between the opposite'ends of the laminated pieces (Z is the soft iron core 7' of an induction coil, the primary winding of which is shown at g, and, the secondary at h. ll

2' designates the soft iron arc-shaped laminations of the armature, the shaft of which is shown-at j, which is drivenby means of the spur-gear Zr, or any equivalent driving means. Said laminations are located'between, and are secured to, the disk-shaped end pieces on and 0, located on opposite sides of the shaft j as shown, bein separatedby, an air space. T he shaft is provided with a squared end portion, as shownat P, that fits shaped socket in the end piece 021-, and 1S riveted over or welded to make a solid joint between the shaft 3' and the end piece m.

It will be noticed that the laminations i are spaced from each other, as shown at 2 (Figs. 1, 2, and 3) thereby providing room for transmitting the spark current from the secondary winding of the induction coilto the distributor cables. Tlie g-ai c-shaped surface of the laminations 2' extends substanr. tially through 185,the purpose of which W111 e an explained, although I do not lOt confine myself to the exact number of de grees.

Located between the'l'aminations 2' of the armature and the pole-pieces b andd is an adjustable slotted cylindrical member that l is composed of a series of soft iron lon itudinally arranged bars, as shown at a, an the location of these bars with relation to the pole-pieces and the laminationsz', determines in a measure the output of the machine, or the wave form of the spark current.-

' Each pole-piece b, and the laminated bar d, and spaces d extend through an arc of and the extent of curvature of the bars s also extends through 45. The laminationsz' of the armature therefore cover, as shown in Fig. 3, a distanceequal to one bar and two I spaces, or 135, or two bars and one space.

Referring now to the make and break mechanism which is clearly illustrated in Figs. 1 and 4, and which is carried by the slotted cylindrical member: 9' designates a circuit breaker cam secured to the disksha'ped head-piece 0 of the armature and driven therefron1,this cam being provided with the elevations 1*," four of w ich are shown. Operatively associated with the circuit breaker. cam g is the make and break lever B that has a platinum contact point 25, carried'by its free end. The make and break lever s is provided with a hardened bearing piece, as shown at u, and is normally'held against the fixed stop a by means of the leaf-spring w which is constantly in a state of,stress. The contact lever a, and stop are mounted on a circuit breaker plate 00 which, in turn, is secured to the rlng-shaped I end member 2 of the slotted cylinder memher previously referred to. a designatesa plate thatis secured to the circuit breaker plate 00 by means of the screw 3 for holding the contact lever s in place. 2 designates a handle that is suitably connected to the slotted cylindrical member by means of which the bars 2 and dislcshaped head a? and the circuit breaker plate 02 are secured and may be moved from one position to another for the urpose of varying the amount of magnetic ux' that flows from the permations and the path of the currents of the ma-.

chine:'One end of the winding of the primary coil g isconnected to the field or ground of the machine by means of the screw 3, the other end of the primaryvwinding being connected'to the contact or plate 3 which is: screwed to the frame otthe machine but insulated therefrom by means of the insulation 3. From said plate 3 a wire 4 makes connection with the platinum conconnection with the frame of the machine, a

or grounded. 5 designates the usual condenser which is connectedin parallel or across the terminals of the make and break for the purpose of reducing or absorbing the spark, as usual; and isinsulated from the frame of the machine, as shown at 5 This condenser is protected by means of an alu' ininum housing 6 and is held to the frame 7, by means of the bolt 8 and a latch 8. 9 designates a terminal by means of which the primary winding may be grounded when it is desired to cut out the operation of the machine. The terminal 9 is in electrical connection with the plate 9 of the condenser, which terminal provides means for connect- --ing one side/of the condenser, and also for grounding the other side.

Referring now to the secondary of spark current: ()ne terminal of the secondary coil or: winding h is connected to the primary winding, as at 3, the other terminal of the secondary winding being connected to the brass button 10, and the current is-conveyed by means of the spring 11 and conductor 12, which is connected to the insulated tubular casing 13. The conductor 12 passes through the insulator of hard rubber '14 to the distributer segment 15. J16 designates a hard rubber insulator or housing for the high ten sion terminals 17 with which the distributer segment 15 contacts during the rotation of the armature or inductor. '18 designates cables connected to the terminals 17, and which lead to the cable sockets in the distributer plate 19, and from the sockets the high tension current is distributed by means of cables to the spark-plugs of thevarious cylinders in the usual manner.

In Fig. 2 (which shows a slightly modified construction) the condenser 20, instead of being placed some distance away from the primary winding, is located in close proximity thereto. The conductor in this case is provided with a perforation whereby the same may be placed over one terminal of the core f of the induction coil.

The make and break device shown in Fig.

2 is also somewhat different Irom that shown in Figs. 1 and 4: In this construction, 21 designates a leaf-spring which is secured to the part cl by means of the screw 22, and carries at its outer end a soft-iron armature tion will always occur k an adjustable,-

23. 24 designates a bent arm or finger-piece that is attached to the leatspring 21 and carries a contact point 25 which engages and disengages a contact-piece 26 that. is made adjustable by means of the milled nut 27. The cylindrical. slotted member, composed of the bars 2-, is adapted to be adjusted by means of the handle, whereby the time of sparking may be either advanced or retarded. It will. also be observed that the primary and secondary windings g and I1, and the condenser, can, if necessary, be rea lily removed from the machine and a new one substituted. Furthelythatthe inductor element contains no moving wire.

The wiring connectionsemployed in my machine are well known and have not, there.- tore, been elaborated in full.

It will also be understood that by reason of the make and break mechanism being carried by the slotted cylindrical member when the bars 2 are adjusted, the greatest inducwhen the make and break occurs, and therefore the adjustment of the spark, whether advanced or retarded, will always be of the same voltage, practically.

What I claim, is

1'. A megnetoelectric-'machine having in combination with the p'ern'ianent field magnets tl ereot', a rotatable inductor element,

but normally stationary element, located between the field magnets and the inductor element for varying the magnetic flux through the inductor element, an induction coil, the core of the same being included in the magnetic circuit, and means carried by the inductor element for making and breaking the primary circuit.

2. In a magnetoelectric machine, permanent magnets, a magnetizable core element, an induction coil located thereon, an inductor element'for periodically varying the flow of-magnetic flux from the permanent magnet to the core element, and means for :hanging the density of magnetic flux passing from the permanent magnets to the core element. whereby the wave form of the current and voltage generated in the induction coil may be changed. I

3. In a magneto-electric machine of the inductor alternator type, in combination, permanent magnets, magnetizable element spaced therefrom and provided with an induction coil, an inductor element for periodically changing the magnetic condition of the magnetizable element, and adjustable means for varying flux through said elements. said means coinprising a series of soft ironbars spaced the flow of the magnetic l l l l 1 from each other, whereby an alternating curelement interposed between the field magrent of electricity is produced.

4. In a magneto electric machine of the inductor alternator type, in combination, permanent magnets, magnetizable elements spaced therefrom and provided with an induction COll, an inductor element 'for periodically changing the magnetio'condition of the magnetizable element, and adjustable means for varying the magnetic flux through said elements, said means comprising a series of bars spaced from each other, the inductor element having an arc-shaped outer surface.

5. In a magneto-electric machine, in combination. permanent magnets, and magnetiz-. able elements having poles arranged substantially apart, a coil having a primaryand secondary, arranged on the magnetizable element, a rotatable inductor member comprising magnetizable members spaced from each other, and located Within said poles, whereby alternating currents having two complete cycles per revolution for the inductor may begenerated. in the coil, means, tor changing the density of theflux in the magnetizable element, and a make and break carried by said means, as described,

6. In a magneto-electric machine, in combination, permanent magnets, and magnetizable elements having poles spaced substantially 90 apart from the poles of the permanent magnets, an induction coil having its primary arranged on the magnetizable elements, a rotatable inductor element, a slotted cylindrical element for changing the flux density in the magnetizable elements, a make and break device included in theprimary winding and carried by the cylindrical element, whereby the make and break occurs in the primary at the maximum point of induction in'the magnetizable elements.

7. A magneto electric machine having in combination with the poles of permanent magnets, a rotatable inductor. element 10-. cated therebetween, and a slotted adjustable element between the inductor and poles, said slotted element having magnetizable bars extending through an arc of substantially 45.",

and spaces between the bars of 45 in extent, and the inductor element having an are extending through substantially 135, and each pole of the magnet being equal in extent to a barof the adjustable element,.a magnetizable element having its poles arranged in magnetic relation tosaid inductor element, an induction coil, the core of said coil being arranged in the path of the flux through said magnetizable element, substantially as described.

8. A magneto-electric machine having in combination with the-permanent field magnets thereof, a rotatable inductor member composed of arc-shaped elements spaced from each other and located on'opposite sides of the axis of said member, an ad-"' justable, but normally stationary cylindrical nets and the inductor member for va ying the magnetic flux through the ind ictor member, an induction coil, the core of the same being included in the magnetic circuit,

and means carried by the inductor member for making and breaking the prlmary 01rcuit of said coil.

9. A-magneto electric machine having in 10 'but normally stationary element located between the field magnets and the inductor elements for varying the flux in said element, a magnetizable member adapted to be energized from said inductor, and an induction coil included in the flux of said mag 15 netizable member, substantially as described.

THEODOR M. MUELLER. Witnesses:

' K. I. CLEMoNs,

HARRY W. BOWEN. 

